Answer:
The main damange that the arrival of Columbus caused to the Native American civilizations was the spread of Eurasian diseases like measles or viruela, for which the Native Americans did not have antibodies.
These diseases were very contagious, and quickly spread among the Native populations all over the Americas, from Canada to South America, killing about 90% of the pre-columbian population.
They have lost some of there family and they had died because of gaz.
Grassland hunting is more open and more wildlife, And grasslands are important for hunting because it's one of the main Biomes.
Old Light preachers believed that religion should be practiced in a rational way, New Light preachers propagated emotion in religion.